Mastering Proxmox - Third Edition

Storage level

Storage plays an important role for any virtual environment and deserves the same level of redundancy attention as the rest of the cluster. There is no point in implementing redundancy in all Proxmox host nodes, networks, and power supplies, then putting virtual disk images on a single NAS storage without any redundancy. If the single node storage fails, even though it is considered shared storage, all VMs stored on it will be completely unusable. In a production environment, use of enterprise-grade storage systems such as Ceph and Gluster is critical. This type of storage has redundancy built into the firmware/operating system. We still need to ensure that these storage nodes have node, utility, network, and HVAC-level redundancy ...